BSA Commercial No1 Mk3.

[smle addict]

Well, I couldn't resist posting my trio of BSA's. From top to bottom, A MLE MK I (Without a safety on the cocking piece), A CLLM Mk I*, and an SMLE MK III (With cut-off and matching adjustable rear sight, but no volley sights).
The MLE and SMLE are both numbers matching throughout. The CLLM is non-matching. I suspect it was frequently used in competition as certain components match, like rear sight matching to the receiver, but not the barrel. These are fun rifles to shoot.